#$&*
course phy 201
11-20-11 9. I am not 100% that this is all of our labs. Funny how I can't read my own notes. Some of the things we have done in class I wasn't sure about submitting because we answered questions in class. Let me know if I haven't submitted something that I should have. I haven't missed any labs so I should have all the data for everything we have done. Thanks
Lab ExperimentsDOMINO MEASUREMENTS
width=(15/16)inch
thick=(1/4)inch
length=1.87inch
ROTATING STRAP
A metal strap is balanced on a dice and rotated.
Rotating strap with dominos on the ends of the strap
2 turns in 2 seconds before coming to rest
Rotating strap with dominos halfway to the center of the strap
1 turn in 2 seconds before coming to rest
Rotating strap with no dominos
1.25 turns in 2 seconds before coming to rest
CARS ON OPPOSITE SIDES OF PULLEY (ATWOOD MACHINE)
Cars suspended on opposite sides of a pulley with four different forces involved when the pulley is light an frictionless. Tension in the string is the same throughout. Cars are M1 and M2.
TOY CAR COASTING TO REST ON TABLETOP
Car traveled 60cm in 3 sec before coming to rest
assuming mass of car to be 10 g.
4 RUBBER BAND CHAINS & 2 TOY CARS, STRAP
cars suspended by rubber band chains on opposite sides of a metal strap
facing the strap, the more massive car on the right
3 SLOPES OF RAMP
Distance Time Rise
60cm 2.5s 5cm domino
60cm 3.5s 2.5cm domino
60cm 6s 0.7cm domino
VERTICAL AND HORIZONTAL MOTION
A projectile leaves the edge of the table and falls to the floor. a=9.8m/s^2 `ds=74 cm or 0.74m
LENGTH OF THICK V/S LENGTH OF THIN RUBBER BANDS
10 Thick rubber bands and 2 thin rubber bands are all connected together and stretched along side a meter stick.
How far stretched on m stick Length of 10 thick rubber bands Length 2 thin rubber bands
90cm 75.5cm 14.5cm
100cm 81cm 18cm
110cm 85cm 25cm
120cm 90.5cm 29.5cm
130cm 96.5cm 33.5cm
RUBBER BAND STRETCH WITH DOMINO WEIGHTS
Number of dominos Width of weights Rubber band stretch
2 1.9cm 65.5cm
4 3.8cm 68.5cm
6 5.8cm 72.4cm
8 7.7cm 77.8cm
10 9.5cm 84.5cm
COLORED RUBBER BAND CALIBRATION (3 BLUE & 1 RED)
Number of dominos Length of rubber bands in cm
0 27cm
2 28cm
4 30.5cm
6 35cm
8 41cm
10 50.5cm
3 RUBBER BANDS IN Y SHAPE WITH PAPERCLIPS HOLDING RUBBER BANDS TOGETHER IN CENTER OF Y
points on the graph stretch using calibrated rubber bands length of rubber bands
(18.5,37) RB1 33cm RB1 35cm
(44,42.5) RB2 28cm RB2 9.5cm
(53.5,24) RB3 32.8cm RB3 24cm
(54,23.2)
(57,21.5)
(81,8.5)
BALANCING 3 DOMINO ON A STRAP ON A FULCRUM (DICE)
30cm strap Moment arms each domino=15000 dynes
18cm
2.7cm
10cm
2ND EXPERIMENT BALANCING 3 DOMINOS ON A STRAP ATOP A DICE
30cm strap Moment arms each domino=15000dynes or 15g
11.5cm
4cm
14cm
1 rotation in 2 seconds
CANDY BAR EXPERIMENT
candy bar was suspended from the calibrated rubber band chain and oscillated 150 times in 1 minute
HOTWHEELS ROLLING DOWN RAMP
A hotwheels cars that weighs 50 grams rolls down a ramp inclined at 30 degrees from horizontal.
STEEL BALL COLLIDING WITH MARBLE
A steel ball is released on a 30cm and collides with a marble at the end of another 30cm ramp (ramps are end to end). The marble and steel ball fall vertically to the floor 1 meter.
marble hit by steel ball travels 37.1cm horizontally
steel ball that hit marble travels 25.1cm horizontally
steel ball released on ramp without hitting a marble travels 16.2cm
Steel ball diameter=2.7cm
Marble diameter=2.5cm
POINT OF VIEW OF BALL COLLIDING WITH MARBLE (ELASTIC COLLISION)
A ball and a marble are rolled toward one another on a tabletop and collide.
mass of ball=70g mass of marble=10g
Before Collision After Collision
ball moves 20 cm/s ball moves 3 cm/s
marble moves 60 cm/s marble moves 25 cm/s
1 STEEL BALL WITH AN INCREASING VELOCITY CATCHES UP WITH STEEL BALL AT A CONSTANT VELOCITY
M1 will be steel ball with increasing velocity
M2 will be steel ball with constant velocity
M1 has V0=0 a=24cm/s Vf=48cm/s and travels 60cm in 2.5s
M2 has constant v=7cm/s and is released 4.3 cm above a 30 cm ramp
METAL STRAP, MAGNETS, AND DOMINOS ROTATING ON 2 DOMINO AND A DICE
each domino is .9cm thick
the metal stap is 30cm in length and as a magnet attached to the underside of opposite side of the strap. The strap and magnets are balanced on top of 2 dominos and 1 dice. The strap is pushed by opposing magnetic force with a small magnet to begin rotation of the strap.
Trial 1(no dominos on top of metal strap):
(1/4) turn in 2 sec=360 degree in 6 sec=1 rotation/6 sec
Trial 2 (2 dominos, 1 on opposite sides of the strap):
(1/8) turn in 1 sec=360 degree/8 sec=1 rotation/8 sec
Trial 3 (4 dominos, 2 dominos stacked on top of each other on opposite sides of the metal strap:
(3/16)turn in 2.5 sec=1 rotation/13.25 sec
V0=0 on all trials
PENDULUM
A pedulum has 16 cycles in 10 sec
"
@&
I'll check later for completeness but your data reports are very good, clearly described and easily readable. I don't see any obvious omissions.
*@
*@